221001201001 has 16 divisors (see below), whose sum is σ = 262595232000. Its totient is φ = 181978429248.

The previous prime is 221001200977. The next prime is 221001201037. The reversal of 221001201001 is 100102100122.

It is not a de Polignac number, because 221001201001 - 2¹³ = 221001192809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221001211001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2694970 + ... + 2775763.

It is an arithmetic number, because the mean of its divisors is an integer number (16412202000).

Almost surely, 2^221001201001 is an apocalyptic number.

It is an amenable number.

221001201001 is a deficient number, since it is larger than the sum of its proper divisors (41594030999).

221001201001 is a wasteful number, since it uses less digits than its factorization.

221001201001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5470968.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 221001201001 its reverse (100102100122), we get a palindrome (321103301123).

The spelling of 221001201001 in words is "two hundred twenty-one billion, one million, two hundred one thousand, one".